The fallout from the launch of iOS 7 shows no sign of abating as more reports
of glitches in Apple's new operating system continue to appear online.

Some app producers have been plunged into "crisis mode" by the software update after it appeared users were consistently being logged out of their accounts, according to technology blog The Verge.

Popular apps like Mailbox and Snapchat have been affected by the bug and have been working around the clock to solve the problem.

Sources at Mailbox told the site that the problem has put the company "in crisis mode" for days, with the developers updating their app to remove background refresh as a temporary measure.

The problems were said to have surfaced shortly after iOS 7 – Apple's much-anticipated new software used on iPhones, iPads and iPod touches – launched worldwide last Wednesday and have yet to be resolved.

That evening many users hoping to get the update complained of long delays with some being told they would have to wait more than 24 hours before the system was installed.